Generell informasjon Brønnbane navn 34/10-3 Type Formål Status Faktakart i nytt vindu Hovedområde Felt Funn EXPLORATION APPRAISAL SUSPENDED lenke NORTH SEA GULLFAKS Brønn navn 34/10-3 34/10-1 GULLFAKS Seismisk lokalisering 708/709-404 SP 405 Boret i utvinningstillatelse 050 Boreoperatør Boretillatelse 211-L Boreinnretning Bore dager 86 Den norske stats oljeselskap a.s NORSKALD Borestart 14.03.1979 Boreslutt 07.06.1979 Frigitt dato 07.06.1981 Publiseringsdato 05.12.2012 Opprinnelig formål Gjenåpnet Innhold Funnbrønnbane WILDCAT NO OIL NO 1. nivå med hydrokarboner, alder MIDDLE JURASSIC 1. nivå med hydrokarboner, formasjon Avstand, boredekk - midlere havflate Vanndybde ved midlere havflate BRENT GP 25.0 140.0 Totalt målt dybde (MD) [m RKB] 2802.0 Totalt vertikalt dybde (TVD) [m RKB] Maks inklinasjon [ ] 4 Temperatur ved bunn av brønnbanen [ C] Eldste penetrerte alder Eldste penetrerte formasjon Geodetisk datum NS grader 2801.0 93 LATE TRIASSIC LUNDE FM ED50 61 12' 49.48'' N Side 1 av 9
ØV grader 2 11' 55.03'' E NS UTM 6787020.80 ØV UTM 456946.80 UTM sone 31 NPDID for brønnbanen 426 Brønnhistorie General Well 34/10-3 was the second well drilled in the Delta closure in block 34/10 in the Northern North Sea. In the first well, 34/10-1, hydrocarbons were tested and proven to be present throughout the Brent sand. The primary objective of the well 34/10-3 was to test sandstones of Middle Jurassic age. Secondary objectives were sandstones of Early Jurassic and Late Triassic age. Operations and results Well was spudded with the semi-submersible installation Norskald on 14 March 1979 and drilled to TD at 2802 m. When coring for core no 10 the core jammed at 2512.5 m and the core head matrix was left in the hole. Fishing commenced for 3 and a half day until most of it was recovered. Otherwise the operation proceeded without any significant problem. The well was drilled with seawater/gel down to 587 m and with Chrome Lignosulphonate mud from 587 m to TD. Oil shows (yellow fluorescence, cut and "dead oil stain" were recorded at 1410-1470 m at the base of the Hordaland Group. Stronger shows were seen from 1814 m in the Shetland Group m and down to top Brent reservoir. Oil in the mud was observed at 1814 m. The Middle Jurassic Brent Group was encountered at 1892 m, directly underlying a thin Albian-Aptian age Cromer Knoll section. The Brent Group was oil bearing down to the oil water contact at 1972 m. Oil shows on cores continued down to 1997 m. Eight cores were cut in succession from 1904 m to 2025 m in the Brent Group, and one core was cut from 2467 m to 2478.8 m in the Early Jurassic Amundsen Formation. No wire line fluid samples were taken due to problems with sand plugging. The well was suspended on 7 June 1979 as an oil appraisal well. Testing Three drill stem tests were conducted in the Brent Group, one water test and two oil tests. Sand production was a problem in the tests. DST 1 perforated the interval 1990 to 1995 in the water zone. It produced 420 m3 water/day through a 20/64" choke. The water density was 1.0294 g/cm3. The bottom hole maximum temperature was 75.5 deg C, measured at 1973 m. DST 2 perforated the interval 1935 to 1940 m. It produced 450 Sm3 oil and 33000 Sm3 gad /day through two parallel chokes of diameters 20/64" and 10 /64". The GOR was 70 Sm3/Sm3, the oil gravity was 29.2 deg API, and the gas gravity was 0.656 (air = 1). The bottom hole maximum temperature was 72 deg C, measured at 1915 m. DST 3 perforated the interval 1895 to 1900 m. It produced 103 Sm3 oil/day. The gas rate was not recorded. The oil gravity was 29 deg API. The bottom hole maximum temperature was 69.5 deg C, measured at 1871 m. Side 2 av 9
Borekaks i OD Borekaksprøve, topp dybde Borekaksprøve, bunn dybde 310.00 2802.00 Borekaksprøve tilgjengelig YES Borekjerner i OD Kjerneprøve Kjerneprøve - topp dybde Kjerneprøve - bunn Kjerneprøve dybde dybde - enhet 1 1904.0 1918.7 [m ] 2 1919.4 1928.8 [m ] 3 1930.9 1933.4 [m ] 4 1936.1 1947.7 [m ] 5 1953.2 1969.0 [m ] 6 1971.1 1989.2 [m ] 7 1991.9 2007.3 [m ] 8 2007.3 2025.0 [m ] 9 2467.0 2478.8 [m ] Total kjerneprøve lengde 132.8 Kjerneprøve tilgjengelig YES Kjernebilder 1904-1906m 1906-1908m 1909-1912m 1912-1914m 1914-1917m Side 3 av 9
1917-1918m 1919-1922m 1922-1924m 1924-1927m 1927-1929m 1930-1933m 1936-1938m 1938-1941m 1941-1944m 1944-1946m 1946-1947m 1953-1955m 1955-1958m 1958-1961m 1961-1964m 1964-1966m 1966-1969m 1971-1973m 1973-1976m 1976-1979m 1979-1981m 1981-1984m 1984-1987m 1987-1989m 1989-1991m 1991-1994m 1994-1997m 1997-2000m 2000-2002m 2003-2005m Side 4 av 9
2005-2007m 2007-2010m 2010-2012m 2012-2015m 2015-2018m 2018-2020m 2020-2023m 2023-2025m 2467-2469m 2469-2472m 2472-2475m 2475-2477m 2477-2478m Oljeprøver i OD Test type Flaske Topp dyp MD Bunn dyp MD Væske type Test tidspunkt Prøver tilgjengelig DST DST 2 1940.00 1935.00 01.06.1979-00:00 YES Litostratigrafi Top depth Lithostrat. unit 165 NORDLAND GP 998 UTSIRA FM 1072 NO FORMAL NAME 1118 HORDALAND GP 1118 NO FORMAL NAME 1225 NO FORMAL NAME 1252 NO FORMAL NAME 1425 NO FORMAL NAME 1578 ROGALAND GP 1578 BALDER FM 1637 LISTA FM 1748 SHETLAND GP Side 5 av 9
1748 JORSALFARE FM 1827 KYRRE FM 1886 CROMER KNOLL GP 1892 BRENT GP 1892 NESS FM 1978 ETIVE FM 2002 RANNOCH FM 2084 BROOM FM 2092 DUNLIN GP 2092 DRAKE FM 2201 COOK FM 2326 BURTON FM 2336 AMUNDSEN FM 2495 STATFJORD GP 2495 NANSEN FM 2561 EIRIKSSON FM 2677 RAUDE FM 2715 HEGRE GP 2715 LUNDE FM Geokjemisk informasjon navn format størrelse [KB] 426_GCH_1 pdf 1.18 426_GCH_2 pdf 2.07 426_GCH_3 pdf 2.90 426_GCH_4 pdf 0.49 er - eldre OD WDSS rapporter og andre relaterte dokumenter navn format størrelse [KB] 426_01_WDSS_General_Information pdf 0.11 426_02_WDSS_completion_log pdf 0.19 er - rapportert av utvinningstillatelsen (frigitt ihht til regelverk) navn format størrelse [KB] 426_34_10_3_ANALYSIS_OF_OIL PDF 1.01 Side 6 av 9
426_34_10_3_COMPARION_OF_7_OIL_SAMPL ES_K PDF 0.26 426_34_10_3_COMPLETION_REPORT PDF 11.67 426_34_10_3_CORE_ANALYSES_GECO PDF 0.17 426_34_10_3_CORE_ANALYSIS_REPORT PDF 3.38 426_34_10_3_CORRECTION_TO_GEOLOGICA L_PROGNOSIS_&_DRILLING_PROGRAM PDF 0.38 426_34_10_3_DST 1 pdf 4.28 426_34_10_3_FINAL_REPORT_CORE_1_9 PDF 1.29 426_34_10_3_Foto pdf 70.37 426_34_10_3_GEOLOGICAL_PROGNOSIS_AN D_DRILLING_PROGRAM 426_34_10_3_LABORATORY_STUDY_ON_COR ES PDF 3.14 PDF 3.15 426_34_10_3_NPD_CPI PDF 0.54 426_34_10_3_oil_and_gas_flow_rates pdf 4.33 426_34_10_3_PALEONTOLOGICAL_STRATIGR APHICAL_REPORT PDF 7.17 426_34_10_3_PALEONTOLOGICAL_STUDY PDF 0.41 426_34_10_3_PETROPHYSICAL_EVALUATION PDF 3.59 426_34_10_3_POROSITY_AND_PERMABILITY _RESULTS PDF 0.06 426_34_10_3_POSITIONING_OF_NORSKALD PDF 0.62 426_34_10_3_PRESSURE_PREDICTION PDF 2.42 426_34_10_3_PVT_STUDY_OF_BOTTOM_HOL E_SAMPLE PDF 1.00 426_34_10_3_SLUTTRAPPORT PDF 1.56 426_34_10_3_SOURCE_ROCK_EVALUATION PDF 2.47 426_34_10_3_SPESCIAL_CORE_ANALYSIS_S TUDY PDF 2.37 426_34_10_3_TESTING_PROGRAM PDF 0.10 426_34_10_3_TEST_PROGRAM PDF 0.77 426_34_10_3_TEST_REPORT PDF 2.66 426_34_10_3_WATER_ANALYSIS PDF 0.34 426_34_10_3_WATHERFLOOD_TEST PDF 0.54 426_34_10_3_WETTABILITY_STUDY_OF_SAM PLES_FEB_1980 PDF 4.86 Borestrengtester (DST) Side 7 av 9
Test Fra dybde MD Til dybde MD Reduksjonsven til størrelse [mm] 1.0 1965 1970 7.9 2.0 1910 1915 7.9 3.0 1870 1875 4.0 Test Endelig avstengningstrykk [MPa] Endelig strømningstrykk [MPa] Bunnhullstrykk [MPa] 1.0 31.500 2.0 30.600 Borehullstempera tur [ C] 3.0 69 Test 1.0 Olje produksjon [Sm3/dag] Gass produksjon [Sm3/dag] Oljetetthet [g/cm3] Gasstyngde rel. luft GOR [m3/m3 ] 2.0 450 33000 0.877 0.656 70 3.0 103 0.882 Logger Type logg Topp dyp Bunn dyp for for logg logg BHC GR CAL 2490 2795 CBL GR 195 1809 CBL VDL GR 1670 2344 DLL MSFL GR 1809 2346 FDC CNL GR CAL 1809 2798 FDC GR CAL 571 1818 HDT 1809 2797 ISF SON GR SP 175 2797 VELOCITY 620 2705 Foringinsrør og formasjonsstyrketester Type utforing Utforing diam. [tommer] Utforing dybde Brønnbane diam. [tommer] Brønnbane dyp Slam egenvekt ekvivalent [g/cm3] Type formasjonstest CONDUCTOR 30 254.0 36 257.0 0.00 LOT Side 8 av 9
SURF.COND. 20 571.0 26 586.0 1.64 LOT INTERM. 13 3/8 1475.0 17 1/2 1488.0 1.72 LOT INTERM. 9 5/8 1812.0 12 1/4 1820.0 2.02 LOT LINER 7 2346.0 8 1/2 2347.0 2.31 LOT OPEN HOLE 2802.0 6 2803.0 0.00 LOT Boreslam Dybde Egenvekt, Viskositet, Flytegrense Type slam MD slam [g/cm3] slam [mpa.s] [Pa] 600 1.08 42.0 waterbased 835 1.09 40.0 waterbased 960 1.14 41.0 waterbased 1555 1.50 42.0 waterbased 1810 1.55 44.0 waterbased 1895 1.78 47.0 waterbased 2405 1.60 50.0 waterbased Dato, måling Side 9 av 9